Now you can have it either way.
BMW motorcycles have a wacky accessory power plug known as a Powerlet Outlet. It's basically like a cigarette lighter, but about half the diameter.
The upside to this Eurocentric receptacle is the positive snap connection. Anything plugged into it really locks into place. The downside is, well- almost nothing plugs into it. Most accessories are made to go into the good old 'Merican cigarette lighter receptacle.